fixed typo in file

Joel Grunbaum

2022-02-02 55bf2265c05a6d3a8e81d063235d7c93814c3fa9

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extra-keys = [ \
 ['ESC','|','/','HOME','UP','END','-','DEL'], \
 ['TAB','CTRL','ALT','LEFT','DOWN','RIGHT','_','BKSP'] \
]